X Japan has sold more than 20 million albums and singles worldwide, and over 2 million videos to date. They set performance records throughout Japan, becoming the first Japanese artist to play three consecutive sold-out concerts at the 50,000 seat Tokyo Dome. Until its disbandment in 1997, X Japan played a total of 13 shows at this venue.

Yoshiki has lent his talent and vision to a variety of other projects. He has composed music for film and TV programs, climbed the UK charts with a song co-composed with Roger Taylor of Queen, and received critical praise for arranging Kiss's 'Black Diamond' into a piano concerto for the band's tribute album. Yoshiki, who has been studying classical piano since childhood, demonstrates these roots with classical orchestrations for particular projects. The London Philharmonic Orchestra took part in his project with George Martin, legendary producer of the Beatles. Yoshiki wrote and co-produced the double album Eternal Melody, which has sold more than 300,000 copies and is one of Japan's top-selling classical albums.

Later Yoshiki signed a deal with PolyGram group as a producer. During his negotiations with PolyGram, Yoshiki established a major label. Sales of his works as a producer have exceeded 50 million.

In 1999, Yoshiki accepted an offer to compose and perform at the ceremony honouring the 10th anniversary of the current Japanese emperor's reign. He played his commemorative instrumental piece on piano, accompanied by a 77 piece orchestra. Selected celebrities, sports figures and government officials were among the live audience of 15,000.

In 2000, Yoshiki received an award of appreciation from the Minister of Education, Culture, and Science for his postitive influence on Japanese society and culture. He also accepted an offer from the Minister of Economy, Trade, and Industry to take up the post of composer for the 2005 World Expo which will be held in Japan.